It is not for buying things for money, and about 25-50 accounts have 90% of all the steem power. Besides they can't sell ALL of their Steem, since it is locked in the SP, only 1% per week. The problem with that is alarmism, and well disillusionment with the system as it is.
And yeah, it is good to buy Steem, especially if it goes any lower, and use SBD for payments. For best results there might be some need for SP transferrals. Hmm, perhaps I should suggest it in the bounty discussion.